Decibel Meter is a free iPhone application designed to measure sound volume in decibels (dB) in real-time. With this app, users can easily monitor and track the sound levels around them.

The main feature of Decibel Meter is its ability to display the current sound volume in real-time. Users can instantly see the decibel value on the main indicator, along with a short explanation of what the value means. Additionally, there is a volume value timeline at the bottom of the screen, allowing users to track the sound levels over time.

One notable feature of the app is its settings screen, which provides the ability to calibrate the decibels according to the device's microphone specifics. This ensures accurate and reliable measurements.

Moreover, Decibel Meter also offers an Apple Watch application, allowing users to measure sound volume without the need for an iPhone device. This convenient feature makes it easy to monitor sound levels on the go.

Overall, Decibel Meter is a useful utility app for anyone who needs to measure sound volume in real-time. Its intuitive interface and additional features make it a valuable tool for various applications.